1209620353 has 2 divisors, whose sum is σ = 1209620354. Its totient is φ = 1209620352.

The previous prime is 1209620311. The next prime is 1209620387. The reversal of 1209620353 is 3530269021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193564304 + 16056049 = 34548^2 + 4007^2 .

It is an emirp because it is prime and its reverse (3530269021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1209620353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1209620453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604810176 + 604810177.

It is an arithmetic number, because the mean of its divisors is an integer number (604810177).

Almost surely, 2^1209620353 is an apocalyptic number.

It is an amenable number.

1209620353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209620353 is an equidigital number, since it uses as much as digits as its factorization.

1209620353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 1209620353 is about 34779.5967917973. The cubic root of 1209620353 is about 1065.4907780861.

Adding to 1209620353 its reverse (3530269021), we get a palindrome (4739889374).

The spelling of 1209620353 in words is "one billion, two hundred nine million, six hundred twenty thousand, three hundred fifty-three".